Paul J. Bereswill / AP PhotoMelanie OudinMelanie Oudin, the feisty teenager from Marietta, Ga., has vaulted into the quarterfinals at the U.S. Open, dispatching elite Russians Maria Sharapova, Elena Dementieva, and Nadia Petrova along the way. VIEW OUR GALLERY of Oudin's victories.09.07.09 3:07 PM ETPaul J. Bereswill / AP PhotoPaul J. Bereswill / AP PhotoSeventeen-year-old Melanie Oudin of Marietta, Ga., serves to Anastasia Pavlyuchenkova of Russia during the first round of the U.S. Open on Sept. 1. Timothy A. Clary, AFP / Getty ImagesOudin cheers after defeating the No. 4 seed, Elena Dementieva of Russia, during their second-round U.S. Open match on Sept. 3. Matthew Stockman / Getty ImagesOudin serves to former U.S. Open champion Maria Sharapova of Russia, the No. 29 seed, on Sept. 5. Paul J. Bereswill / AP PhotoOudin reacts during her match against Sharapova. Emmanuel Dunand, AFP / Getty ImagesOudin returns a shot to Sharapova.Michael Heiman / Getty ImagesOudin celebrates match point against Sharapova. Paul J. Bereswill / AP PhotoOudin, left, shakes hands with Sharapova after winning 3-6, 6-4, 7-5. Timothy A. Clary, AFP / Getty ImagesOudin during her match with the No. 13 seed, Nadia Petrova of Russia, on Sept. 7. Kathy Willens / AP PhotoOudin returns to Petrova. Matthew Stockman / Getty ImagesOudin reacts to a point against Petrova.Amy Sancetta / AP PhotoLeslie Oudin, bottom left, mother of Melanie Oudin, and sister Katherine, right, weep in the player's family and friends box after Oudin's 1-6, 7-6(2), 6-3 upset victory over Petrova. Chris McGrath / Getty ImagesOudin celebrates match point against Petrova. The win puts her in the quarterfinals.